The issue with reliability and use of Apple products is considerably more complex than
vinnyvg
First thing you should get clearly in your mind is that APPLE allow you to use their iBooksAuthor application under certain Terms and Conditions.
My mind works clearly differently from yours, Mr. vinnyvg.
I have a long association with Apple products, hardware, software and support. It dates from 1978 and a freebie from Apple, an Apple ][ placed in the math department where I worked with hope to get a foot in the academic door. Since then I have personal owned and used tens of thousands of dollars worth of Apple devices and software. I have made purchase decisions covering over $26,000,000 in Apple products for education and business. When Apple has asked a price I have paid it. When Apple has provided something for free I have take it. That is Apple's choice, but it does not change Apple's responsibility and it does not change my rights.
Using Apple products to write my lesson plans and my books, to manage my museum and my businesses never yields my personal rights to my creations. Should I wish to sell my software or books through Apple then I expect Apple will get a portion of the profit, not because of how I produce the works, but because they do the marketing.
In the matter of the capabilities of iBooks Author, yes it is narrowly defined. I find iBooks Author a spin off from Pages and the Book utility in iPhoto. Under my breath I gripe about shortcomings in myself and in Apple, but that is different from legal rights and usage.
In the matter of work-arounds from iBooks Author, that depends on what additional software a person wishes to use, how much one can spend and how organized one can be about workflow. Adobe Acrobat Pro is the standard for PDF work and must be understood, even mastered, but it is not capable of fully and competently dealing with a PDF exported from iBooks Author. The operator / writer must be alert and clever.
iBooks Author supports the artist well. Graphics can be any shape and can be easily overlapped within the given frame options. The layering is clever and quick and always editable, never lost in compacted or flattened layers. The programming errors in iBooks Author are serious which is why there has been no revision. It will have to be replaced.
iBooks Authors does not allow for multi-media except for its own iBooks presentation format. The Glossary and associated index are not capable of URL links. These are cautions for the person who might wish to use iBooks Author as one of several tools in the production of a work (of art or literature.) The "find" function does not search all text. Actually, indexing can only be done fully and accurately out side the xxx.ibook format.
The limitations of iBooks Author contribute to Apple's decision not to charge for it. It is below their usual standards. In addition, it appears at the same time Apple is deciding to offer many other previously charged-for products "for free". The changes have not all been good for the consumer, but that is the ebb and flow of technology.
i find more often than not it is better not to be burdened with "free", "promotional" or "public domain" software.
I help individuals with whom I have ongoing contact, constantly, with consequent shortcomings, but I have stopped offering cluttering complete explanations in public forums. Any change in the object of discussion can render a specific comment unnecessary or unnerving. These forums have lost their user group origin and roots for me.